Examples of areas where primary succession occurs:

The entire sequence of communities that successfully change in a given area is called $P$. The individual transitional communities are termed as $Q$.

Choose the correct identification for the given stage of succession and the stage by which it is followed,respectively.

The detritus food chain starts from:

An ecosystem is a complex interacting system of

Each trophic level has a certain mass of living material at a particular time,which is known as $..........$.